JP3600738B2 - Filtration device - Google Patents

Filtration device Download PDF

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Publication number
JP3600738B2
JP3600738B2 JP26309398A JP26309398A JP3600738B2 JP 3600738 B2 JP3600738 B2 JP 3600738B2 JP 26309398 A JP26309398 A JP 26309398A JP 26309398 A JP26309398 A JP 26309398A JP 3600738 B2 JP3600738 B2 JP 3600738B2
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Japan
Prior art keywords
filter
pipe
water
pump
liquid
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JP26309398A
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JP2000084316A (en
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浩雄 竹川
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石川島芝浦機械株式会社
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Description

【0001】
【発明の属する技術分野】
本発明は、水や海水等の液体を濾過する濾過装置に関する。
【0002】
【従来の技術】
従来、水や海水等の液体を濾過する濾過装置においては、濾過器の洗浄のために定期的に逆洗処理を行っている。この逆洗処理とは、濾過器で濾過された後に貯溜タンクなどに貯溜されている濾過済液体を濾過器の二次側から一次側へ逆流させ、濾過器の一次側に付着しているごみを洗い流す処理である。
【0003】
このような逆洗処理を行うため、従来の濾過装置では、逆洗用ポンプやコンプレッサ等を備えている。
【0004】
逆洗用ポンプを備えた従来例の濾過装置の構造及び作用を図4ないし図6に基づいて説明する。この濾過装置は、未濾過液体を吸い上げるポンプ1と、ポンプ1で吸い上げられた未濾過液体を濾過する濾過器2と、濾過器2で濾過された濾過済液体を貯溜する貯溜タンク3と、貯溜タンク3内に貯溜されている濾過済液体を用いて濾過器2を逆洗するときに駆動させる逆洗用ポンプ4とを備えている。濾過器2では、ポンプ1により吸い上げられた未濾過液体が一次側から二次側へ通過する過程において、この未濾過液体の濾過を行う。
【0005】
一端にストレーナ5が取り付けられた吸水パイプ6の他端がポンプ1の吸水側に接続され、ストレーナ5は濾過対象である未濾過液体中に浸漬されている。ポンプ1の吐水側と濾過器2の一次側との間には送水パイプ7が接続され、この送水パイプ7の途中に開閉弁8が設けられている。送水パイプ7における開閉弁8と濾過器2との間には、一端が逆洗水排水部(図示せず)に開口された逆洗水排水パイプ9の他端が接続され、この逆洗水パイプ9の途中には開閉弁10が設けられている。さらに、濾過器2の一次側にはドレンパイプ11の一端が接続され、このドレンパイプ11の他端は排水部(図示せず)に開口され、ドレンパイプ11の途中には開閉弁12が設けられている。
【0006】
濾過器2の二次側と貯溜タンク3との間には送水パイプ13が接続され、この送水パイプ13の途中に開閉弁14が設けられている。送水パイプ13における濾過器2と開閉弁14との間には、一端が貯溜タンク3に接続された逆洗用パイプ15の他端が接続され、この逆洗用パイプ15の途中に逆洗用ポンプ4が設けられている。
【0007】
貯溜タンク3には、この貯溜タンク3内に貯溜された濾過済液体を取り出す取出パイプ16が接続されている。
【0008】
図5は、未濾過液体を濾過する濾過処理時における液体の流れを説明する説明図である。この濾過処理時においては、開閉弁10,12を閉弁し、開閉弁8,14を開弁し、その後にポンプ1を駆動させる。ポンプ1が駆動されることにより未濾過液体が吸水され、この未濾過液体は、吸水パイプ6と送水パイプ7とを通って濾過器2の一次側へ供給され、濾過器2の二次側へ通過することにより濾過され、濾過済液体となる。濾過器2で濾過された濾過済液体は送水パイプ13を通って貯溜タンク3内に貯溜される。貯溜タンク3内に貯溜された濾過済液体が所定量に達すると、濾過済液体は取出パイプ16から供給される。
【0009】
図6は、濾過器2の一次側に付着したごみを除去するために行う逆洗処理時における液体の流れを説明する説明図である。この逆洗処理時においては、開閉弁8,12,14を閉弁し、開閉弁10を開弁し、その後に逆洗用ポンプ4を駆動させる。逆洗用ポンプ4が駆動されることにより、貯溜タンク3内に貯溜されている濾過済液体が吸水され、この濾過済液体は、逆洗用パイプ15と送水パイプ13の一部とを通って濾過器2の二次側へ供給され、濾過器2の一次側へ通過することにより濾過器2の一次側に付着しているごみを剥離させる。濾過器2を二次側から一次側へ通過した濾過済液体は、濾過器2の一次側から剥離されたごみを含んだ逆洗水となり、この逆洗水は送水パイプ7の一部と逆洗水パイプ9とを通って逆洗水排水部へ排水される。
【0010】
つぎに、コンプレッサを備えた従来例の濾過装置の構造及び作用を図7ないし図9に基づいて説明する。なお、図4ないし図6において説明した部分と同じ部分は同じ符号で示し、説明も省略する。この濾過装置の基本的な構造は図4ないし図6において説明した濾過装置と同じであり、濾過器2を逆洗するために逆洗用ポンプ4に代えてコンプレッサ17を設けた点が異なる。
【0011】
コンプレッサ17と貯溜タンク3との間には空気供給パイプ18が接続されており、この空気供給パイプ18の途中に開閉弁19が設けられている。この貯溜タンク3内に貯溜された濾過済液体を取り出す取出パイプ16の途中には、開閉弁20が設けられている。
【0012】
図8は、未濾過液体を濾過する濾過処理時における液体の流れを説明する説明図である。この濾過処理時においては、開閉弁10,12,19を閉弁し、開閉弁8,20を開弁し、その後にポンプ1を駆動させる。ポンプ1が駆動されることにより未濾過液体が吸水され、この未濾過液体は、吸水パイプ6と送水パイプ7とを通って濾過器2の一次側へ供給され、濾過器2の二次側へ通過することにより濾過され、濾過済液体となる。濾過器2で濾過された濾過済液体は送水パイプ13を通って貯溜タンク3内に貯溜される。貯溜タンク3内に貯溜された濾過済液体が所定量に達すると、濾過済液体は取出パイプ16から供給される。
【0013】
図9は、濾過器2の一次側に付着したごみを除去するために行う逆洗処理時における液体の流れを説明する説明図である。この逆洗処理時においては、開閉弁8,12,20を閉弁し、開閉弁19,10を開弁し、その後にエアシリンダ17を駆動させる。エアシリンダ17の駆動により貯溜タンク3内へ空気が供給され、その空気圧により貯溜タンク3内の濾過済液体が送水パイプ13を通って濾過器2の二次側へ供給され、濾過器2の一次側へ通過することにより濾過器2の一次側に付着しているごみを剥離させる。濾過器2を二次側から一次側へ通過した濾過済液体は、濾過器2の一次側から剥離されたごみを含んだ逆洗水となり、この逆洗水は送水パイプ7の一部と逆洗水パイプ9とを通って逆洗水排水部へ排水される。
【0014】
【発明が解決しようとする課題】
上述した従来例の濾過装置では、逆洗用ポンプ4又はコンプレッサ17を必要とするため、装置全体が大型になるとともに重量が増大し、しかも、製造コストがアップする。
【0015】
そこで本発明は、逆洗用ポンプ4やコンプレッサ17を使用せずに逆洗処理を行えるようにし、装置全体の小型化と軽量化とを図るとともに製造コストを低くすることができる濾過装置を提供することを目的とする。
【0016】
【課題を解決するための手段】
請求項1記載の発明は、未濾過液体を吸い上げるポンプと、前記ポンプで吸い上げられた未濾過液体を一次側から二次側へ通過させることにより濾過する濾過器と、前記濾過器で濾過された濾過済液体を貯溜する貯溜タンクと、一端が未濾過液体中に浸漬された第1吸水パイプの他端と一端が前記ポンプの吸水側に接続された第2吸水パイプの他端と一端が前記濾過器の一次側に接続された逆洗用パイプの他端とが接続された第1三方弁と、一端が前記ポンプの吐水側に接続された第1送水パイプの他端と一端が前記濾過器の一次側に接続された第2送水パイプの他端と一端が逆洗水排水部に開口された逆洗水排水パイプの他端とが接続された第2三方弁と、を有する。
【0017】
従って、未濾過液体を濾過する濾過処理時には、第1吸水パイプと第2吸水パイプとが連通するように第1三方弁を切り替え、かつ、第1送水パイプと第2送水パイプとが連通するように第2三方弁を切り替え、ポンプを駆動させる。すると、未濾過液体は、第1吸水パイプと第2吸水パイプと第1送水パイプと第2送水パイプとを通って濾過器へ送られ、濾過器で濾過された濾過済液体が貯溜タンク内へ貯溜される。
【0018】
濾過器の一次側に付着したごみを除去するために行う逆洗処理時には、逆洗用パイプと第2吸水パイプとが連通するように第1三方弁を切り替え、かつ、第1送水パイプと逆洗水排水パイプとが連通するように第2三方弁を切り替え、ポンプを駆動させる。すると、貯溜タンク内の濾過済液体が濾過器側へ吸い上げられ、濾過器を二次側から一次側へ通過した後に、逆洗用パイプと第2吸水パイプと第1送水パイプと逆洗水排水パイプとを通って逆洗水排水部へ排水される。そして、濾過済液体を濾過器の二次側から一次側へ通過させる逆洗により濾過器の一次側に付着したごみが剥離され、濾過器が洗浄される。
【0019】
【発明の実施の形態】
本発明の一実施の形態を図1ないし図3に基づいて説明する。なお、図4ないし図9において説明した部分と同じ部分は同じ符号で示し、説明も省略する。この濾過装置は、未濾過液体を濾過する濾過器2と、未濾過液体を吸い上げる濾過処理時と濾過器2の逆洗処理時とに駆動されるポンプ21と、濾過器2で濾過された濾過済液体を貯溜する貯溜タンク3と、ポンプ21の吸水側に位置する第1三方弁22と、ポンプ21の吐水側に位置する第2三方弁23とを備えている。濾過器2では、ポンプ21により吸い上げられた未濾過液体が一次側から二次側へ通過する過程において、この未濾過液体の濾過を行う。
【0020】
第1三方弁22には、ストレーナ5が取り付けられた一端が未濾過液体中に浸漬された第1吸水パイプ24の他端と、一端がポンプ21の吸水側に接続された第2吸水パイプ25の他端と、一端が濾過器2の一次側に接続された逆洗用パイプ26の他端とが接続されている。第2三方弁23には、一端がポンプ21の吐水側に接続された第1送水パイプ27の他端と、一端が前記逆洗用パイプ26の途中に接続された第2送水パイプ28の他端と、一端が逆洗水排水部(図示せず)に開口された逆洗水排水パイプ29の他端とが接続されている。
【0021】
濾過器2の二次側と貯溜タンク3との間には送水パイプ13が接続されている。貯溜タンク3には、この貯溜タンク3内に貯溜された濾過済液体を取り出す取出パイプ16が接続されている。濾過器2の一次側にはドレンパイプ11の一端が接続され、このドレンパイプ11の他端は排水部(図示せず)に開口され、ドレンパイプ11の途中には開閉弁12が設けられている。
【0022】
このような構成において、未濾過液体を濾過する濾過処理時における液体の流れを図2に基づいて説明する。この濾過処理時においては、第1吸水パイプ24と第2吸水パイプ25とが連通するように第1三方弁22を切り替え、かつ、第1送水パイプ27と第2送水パイプ28とが連通するように第2三方弁23を切り替え、開閉弁12を閉弁し、その後にポンプ21を駆動させる。すると、未濾過液体は、第1吸水パイプ24と第2吸水パイプ25と第1送水パイプ27と第2送水パイプ28と逆洗用パイプ26の一部とを通って濾過器2の一次側へ供給され、濾過器2の二次側へ通過することにより濾過されて濾過済液体となる。濾過器2で濾過された濾過済液体は送水パイプ13を通って貯溜タンク2内に貯溜され、貯溜タンク2内に貯溜された濾過済液体が所定量に達すると、濾過済液体は取出パイプ16から供給される。
【0023】
つぎに、濾過器2の一次側に付着したごみを除去するために行う逆洗処理時における液体の流れを図3に基づいて説明する。この逆洗処理時においては、逆洗用パイプ26と第2吸水パイプ25とが連通するように第1三方弁22を切り替え、かつ、第1送水パイプ27と逆洗水排水パイプ29とが連通するように第2三方弁23を切り替え、開閉弁12を閉弁し、その後にポンプ21を駆動させる。すると、貯溜タンク3内の濾過済液体が送水パイプ13を通って濾過器2側へ吸い上げられ、濾過器2を二次側から一次側へ通過する。そして、濾過済液体を濾過器2の二次側から一次側へ通過させることにより濾過器2の一次側に付着したごみが剥離される。濾過器2を二次側から一次側へ通過した濾過済液体は、濾過器2の一次側から剥離されたごみを含んだ逆洗水となり、この逆洗水が、逆洗用パイプ26と第2吸水パイプ25と第1送水パイプ27と逆洗水排水パイプ29とを通って逆洗水排水部へ排水される。
【0024】
ここで、この濾過装置では、第1三方弁22と第2三方弁23とを切り替えることにより、1つのポンプ21を、濾過処理時における未濾過液体の吸い上げと濾過器2の逆洗処理時における濾過済液体の吸い上げとに使用することができる。このため、逆洗処理時に使用する逆洗用ポンプやコンプレッサを別個に設ける必要がなくなり、装置全体の小型化と軽量化とを図ることができ、さらに、製造コストを低くすることができる。
【0025】
【発明の効果】
請求項1記載の発明の濾過装置によれば、ポンプの吸込み側と吐水側とに配置した2つの三方弁を切り替えることにより、1つのポンプを、濾過処理時における未濾過液体の吸い上げと濾過器の逆洗処理時における濾過済液体の吸い上げとに使用することができる。このため、逆洗処理時に使用する逆洗用ポンプやコンプレッサを別個に設ける必要がなくなり、装置全体の小型化と軽量化とを図ることができ、さらに、製造コストを低くすることができる。
【図面の簡単な説明】
【図1】本発明の一実施の形態の濾過装置を示す概略図である。
【図2】濾過処理時における液体の流れを説明する説明図である。
【図3】逆洗処理時における液体の流れを説明する説明図である。
【図4】逆洗用ポンプを用いて逆洗処理を行う従来例の濾過装置を示す概略図である。
【図5】濾過処理時における液体の流れを説明する説明図である。
【図6】逆洗処理時における液体の流れを説明する説明図である。
【図7】コンプレッサを用いて逆洗処理を行う従来例の濾過装置を示す概略図である。
【図8】濾過処理時における液体の流れを説明する説明図である。
【図9】逆洗処理時における液体の流れを説明する説明図である。
【符号の説明】
2 濾過器
3 貯溜タンク
21 ポンプ
22 第1三方弁
23 第2三方弁
24 第1吸水パイプ
25 第2吸水パイプ
26 逆洗用パイプ
27 第1送水パイプ
28 第2送水パイプ
29 逆洗水排水パイプ
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a filtration device for filtering a liquid such as water or seawater.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in a filtering apparatus for filtering a liquid such as water or seawater, a backwashing process is periodically performed to wash a filter. This backwashing process means that the filtered liquid stored in a storage tank or the like after being filtered by the filter is back-flowed from the secondary side of the filter to the primary side, and garbage adhered to the primary side of the filter. This is the process of washing away.
[0003]
In order to perform such a backwashing process, a conventional filtration device is provided with a backwashing pump, a compressor, and the like.
[0004]
The structure and operation of a conventional filtration device provided with a backwash pump will be described with reference to FIGS. The filtering device includes a pump 1 for sucking unfiltered liquid, a filter 2 for filtering the unfiltered liquid sucked up by the pump 1, a storage tank 3 for storing the filtered liquid filtered by the filter 2, and a storage tank 3. A backwash pump 4 is provided for driving the filter 2 when the filter 2 is backwashed using the filtered liquid stored in the tank 3. The filter 2 filters the unfiltered liquid while the unfiltered liquid sucked up by the pump 1 passes from the primary side to the secondary side.
[0005]
The other end of a water absorption pipe 6 having a strainer 5 attached to one end is connected to the water absorption side of the pump 1, and the strainer 5 is immersed in an unfiltered liquid to be filtered. A water supply pipe 7 is connected between the water discharge side of the pump 1 and the primary side of the filter 2, and an on-off valve 8 is provided in the middle of the water supply pipe 7. One end of a backwash water drain pipe 9 having one end opened to a backwash water drain section (not shown) is connected between the on-off valve 8 and the filter 2 in the water supply pipe 7. An on-off valve 10 is provided in the middle of the pipe 9. Further, one end of a drain pipe 11 is connected to the primary side of the filter 2, the other end of the drain pipe 11 is opened to a drain (not shown), and an on-off valve 12 is provided in the middle of the drain pipe 11. Have been.
[0006]
A water pipe 13 is connected between the secondary side of the filter 2 and the storage tank 3, and an on-off valve 14 is provided in the middle of the water pipe 13. The other end of the backwash pipe 15 whose one end is connected to the storage tank 3 is connected between the filter 2 and the on-off valve 14 in the water supply pipe 13. A pump 4 is provided.
[0007]
The storage tank 3 is connected to an extraction pipe 16 for taking out the filtered liquid stored in the storage tank 3.
[0008]
FIG. 5 is an explanatory diagram illustrating the flow of the liquid at the time of the filtration process for filtering the unfiltered liquid. During this filtration process, the on-off valves 10 and 12 are closed, the on-off valves 8 and 14 are opened, and then the pump 1 is driven. The unfiltered liquid is absorbed by driving the pump 1, and the unfiltered liquid is supplied to the primary side of the filter 2 through the water absorption pipe 6 and the water supply pipe 7, and is supplied to the secondary side of the filter 2. It is filtered by passing through to become a filtered liquid. The filtered liquid filtered by the filter 2 is stored in the storage tank 3 through the water supply pipe 13. When the filtered liquid stored in the storage tank 3 reaches a predetermined amount, the filtered liquid is supplied from the extraction pipe 16.
[0009]
FIG. 6 is an explanatory diagram illustrating the flow of the liquid during the backwashing process performed to remove dust attached to the primary side of the filter 2. During the backwashing process, the on-off valves 8, 12, and 14 are closed, the on-off valve 10 is opened, and then the backwashing pump 4 is driven. When the backwash pump 4 is driven, the filtered liquid stored in the storage tank 3 is absorbed, and the filtered liquid passes through the backwash pipe 15 and a part of the water supply pipe 13. The dust that is supplied to the secondary side of the filter 2 and passes through the primary side of the filter 2 separates the dust attached to the primary side of the filter 2. The filtered liquid that has passed through the filter 2 from the secondary side to the primary side becomes backwash water containing garbage separated from the primary side of the filter 2, and this backwash water is reverse to a part of the water supply pipe 7. The water is drained to the backwash water drain through the washing pipe 9.
[0010]
Next, the structure and operation of a conventional filtration device provided with a compressor will be described with reference to FIGS. The same parts as those described in FIGS. 4 to 6 are denoted by the same reference numerals, and description thereof will be omitted. The basic structure of this filtration device is the same as that described with reference to FIGS. 4 to 6, except that a compressor 17 is provided in place of the backwash pump 4 for backwashing the filter 2.
[0011]
An air supply pipe 18 is connected between the compressor 17 and the storage tank 3, and an on-off valve 19 is provided in the air supply pipe 18. An on-off valve 20 is provided in the middle of the take-out pipe 16 for taking out the filtered liquid stored in the storage tank 3.
[0012]
FIG. 8 is an explanatory diagram illustrating a flow of a liquid during a filtration process of filtering an unfiltered liquid. During this filtration process, the on-off valves 10, 12, and 19 are closed, the on-off valves 8, 20 are opened, and then the pump 1 is driven. The unfiltered liquid is absorbed by driving the pump 1, and the unfiltered liquid is supplied to the primary side of the filter 2 through the water absorption pipe 6 and the water supply pipe 7, and is supplied to the secondary side of the filter 2. It is filtered by passing through to become a filtered liquid. The filtered liquid filtered by the filter 2 is stored in the storage tank 3 through the water supply pipe 13. When the filtered liquid stored in the storage tank 3 reaches a predetermined amount, the filtered liquid is supplied from the extraction pipe 16.
[0013]
FIG. 9 is an explanatory diagram illustrating the flow of liquid during a backwashing process performed to remove dust attached to the primary side of the filter 2. At the time of this backwashing process, the on / off valves 8, 12, and 20 are closed, and the on / off valves 19 and 10 are opened, and then the air cylinder 17 is driven. Air is supplied into the storage tank 3 by driving the air cylinder 17, and the filtered liquid in the storage tank 3 is supplied to the secondary side of the filter 2 through the water supply pipe 13 by the air pressure, so that the primary The dirt adhering to the primary side of the filter 2 is removed by passing through the filter 2. The filtered liquid that has passed through the filter 2 from the secondary side to the primary side becomes backwash water containing garbage separated from the primary side of the filter 2, and this backwash water is reverse to a part of the water supply pipe 7. The water is drained to the backwash water drain through the washing pipe 9.
[0014]
[Problems to be solved by the invention]
In the above-mentioned conventional filtering apparatus, the backwashing pump 4 or the compressor 17 is required, so that the entire apparatus becomes large, the weight increases, and the manufacturing cost increases.
[0015]
Therefore, the present invention provides a filtration device that enables the backwashing process without using the backwashing pump 4 and the compressor 17, thereby reducing the size and weight of the entire device and reducing the manufacturing cost. The purpose is to do.
[0016]
[Means for Solving the Problems]
The invention according to claim 1 is a pump that sucks the unfiltered liquid, a filter that filters the unfiltered liquid sucked by the pump by passing from the primary side to the secondary side, and a filter that is filtered by the filter. A storage tank for storing the filtered liquid, and one end and one end of a second water absorption pipe having one end connected to the water absorption side of the pump and one end of the first water absorption pipe immersed in the unfiltered liquid. A first three-way valve to which the other end of the backwash pipe connected to the primary side of the filter is connected, and a second end and one end of the first water supply pipe, one end of which is connected to the water discharge side of the pump; A second three-way valve connected to the other end of the second water supply pipe connected to the primary side of the vessel and the other end of the backwash water drainage pipe having one end opened to the backwash water drainage section.
[0017]
Therefore, at the time of the filtration process for filtering the unfiltered liquid, the first three-way valve is switched so that the first water absorption pipe and the second water absorption pipe communicate with each other, and the first water supply pipe and the second water supply pipe communicate with each other. Then, the second three-way valve is switched to drive the pump. Then, the unfiltered liquid is sent to the filter through the first water absorption pipe, the second water absorption pipe, the first water supply pipe, and the second water supply pipe, and the filtered liquid filtered by the filter is put into the storage tank. It is stored.
[0018]
At the time of the backwashing treatment performed to remove dust attached to the primary side of the filter, the first three-way valve is switched so that the backwashing pipe and the second water absorption pipe communicate with each other, and the first water supply pipe is connected to the reverse side. The second three-way valve is switched so as to communicate with the washing water drain pipe, and the pump is driven. Then, the filtered liquid in the storage tank is sucked up to the filter side, and after passing through the filter from the secondary side to the primary side, the backwash pipe, the second water suction pipe, the first water supply pipe, and the backwash water drainage. Drained to the backwash water drain through a pipe. Then, the backwashing that allows the filtered liquid to pass from the secondary side to the primary side of the filter removes dust adhering to the primary side of the filter and cleans the filter.
[0019]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described with reference to FIGS. 4 to 9 are denoted by the same reference numerals, and description thereof will be omitted. The filtration device includes a filter 2 for filtering the unfiltered liquid, a pump 21 driven during a filtration process for sucking up the unfiltered liquid and a backwashing process for the filter 2, and a filtration device filtered by the filter 2. A storage tank 3 for storing spent liquid; a first three-way valve 22 located on the water suction side of the pump 21; and a second three-way valve 23 located on the water discharge side of the pump 21. The filter 2 filters the unfiltered liquid while the unfiltered liquid sucked up by the pump 21 passes from the primary side to the secondary side.
[0020]
The first three-way valve 22 has one end to which the strainer 5 is attached, the other end of the first water absorption pipe 24 immersed in the unfiltered liquid, and the second water absorption pipe 25, one end of which is connected to the water absorption side of the pump 21. And the other end of the backwash pipe 26 whose one end is connected to the primary side of the filter 2. The second three-way valve 23 has one end connected to the other end of the first water supply pipe 27 connected to the water discharge side of the pump 21 and the other end connected to the second water supply pipe 28 connected in the middle of the backwash pipe 26. One end is connected to the other end of the backwash water drain pipe 29, one end of which is opened to the backwash water drain section (not shown).
[0021]
A water supply pipe 13 is connected between the secondary side of the filter 2 and the storage tank 3. The storage tank 3 is connected to an extraction pipe 16 for taking out the filtered liquid stored in the storage tank 3. One end of a drain pipe 11 is connected to the primary side of the filter 2, the other end of the drain pipe 11 is opened to a drain (not shown), and an on-off valve 12 is provided in the drain pipe 11. I have.
[0022]
In such a configuration, the flow of the liquid at the time of the filtration process for filtering the unfiltered liquid will be described with reference to FIG. During the filtration process, the first three-way valve 22 is switched so that the first water absorption pipe 24 and the second water absorption pipe 25 communicate with each other, and the first water supply pipe 27 and the second water supply pipe 28 communicate with each other. Then, the second three-way valve 23 is switched, the on-off valve 12 is closed, and then the pump 21 is driven. Then, the unfiltered liquid passes through the first water absorption pipe 24, the second water absorption pipe 25, the first water supply pipe 27, the second water supply pipe 28, and a part of the backwash pipe 26 to the primary side of the filter 2. It is supplied and filtered by passing through the secondary side of the filter 2 to become a filtered liquid. The filtered liquid filtered by the filter 2 is stored in the storage tank 2 through the water supply pipe 13, and when the filtered liquid stored in the storage tank 2 reaches a predetermined amount, the filtered liquid is removed from the extraction pipe 16. Supplied from
[0023]
Next, the flow of the liquid at the time of the backwashing process performed for removing dust attached to the primary side of the filter 2 will be described with reference to FIG. During the backwashing process, the first three-way valve 22 is switched so that the backwash pipe 26 and the second water absorption pipe 25 communicate with each other, and the first water supply pipe 27 and the backwash water drain pipe 29 communicate with each other. Then, the second three-way valve 23 is switched, the on-off valve 12 is closed, and then the pump 21 is driven. Then, the filtered liquid in the storage tank 3 is sucked up to the filter 2 side through the water supply pipe 13 and passes through the filter 2 from the secondary side to the primary side. Then, by passing the filtered liquid from the secondary side of the filter 2 to the primary side, dust attached to the primary side of the filter 2 is separated. The filtered liquid that has passed through the filter 2 from the secondary side to the primary side becomes backwash water containing refuse separated from the primary side of the filter 2, and this backwash water is connected to the backwash pipe 26 and the (2) The water is drained to the backwash water drain section through the water absorption pipe 25, the first water supply pipe 27, and the backwash water drain pipe 29.
[0024]
Here, in this filtration device, by switching between the first three-way valve 22 and the second three-way valve 23, one pump 21 sucks up unfiltered liquid at the time of filtration processing and at the time of backwashing of the filter 2. Can be used for wicking filtered liquid. For this reason, it is not necessary to separately provide a backwash pump or a compressor used in the backwash process, so that the size and weight of the entire apparatus can be reduced, and the manufacturing cost can be reduced.
[0025]
【The invention's effect】
According to the filter device of the first aspect of the present invention, two pumps are switched between the three-way valve disposed on the suction side and the water discharge side of the pump, so that one pump can draw up the unfiltered liquid during the filtration process and the filter. Can be used for sucking up the filtered liquid at the time of back washing. For this reason, it is not necessary to separately provide a backwash pump or a compressor used in the backwash process, so that the size and weight of the entire apparatus can be reduced, and the manufacturing cost can be reduced.
[Brief description of the drawings]
FIG. 1 is a schematic diagram showing a filtration device according to an embodiment of the present invention.
FIG. 2 is an explanatory diagram illustrating a flow of a liquid during a filtration process.
FIG. 3 is an explanatory diagram illustrating a flow of a liquid during a backwashing process.
FIG. 4 is a schematic view showing a conventional filtration apparatus for performing a backwashing process using a backwashing pump.
FIG. 5 is an explanatory diagram illustrating a flow of a liquid during a filtration process.
FIG. 6 is an explanatory diagram illustrating a flow of a liquid during a backwashing process.
FIG. 7 is a schematic view showing a conventional filtration device that performs a backwashing process using a compressor.
FIG. 8 is an explanatory diagram illustrating a flow of a liquid during a filtration process.
FIG. 9 is an explanatory diagram illustrating a flow of a liquid during a backwashing process.
[Explanation of symbols]
2 Filter 3 Storage tank 21 Pump 22 First three-way valve 23 Second three-way valve 24 First water absorption pipe 25 Second water absorption pipe 26 Backwash pipe 27 First water supply pipe 28 Second water supply pipe 29 Backwash water drainage pipe

Claims (1)

未濾過液体を吸い上げるポンプと、
前記ポンプで吸い上げられた未濾過液体を一次側から二次側へ通過させることにより濾過する濾過器と、
前記濾過器で濾過された濾過済液体を貯溜する貯溜タンクと、
一端が未濾過液体中に浸漬された第1吸水パイプの他端と、一端が前記ポンプの吸水側に接続された第2吸水パイプの他端と、一端が前記濾過器の一次側に接続された逆洗用パイプの他端とが接続された第1三方弁と、
一端が前記ポンプの吐水側に接続された第1送水パイプの他端と、一端が前記濾過器の一次側に接続された第2送水パイプの他端と、一端が逆洗水排水部に開口された逆洗水排水パイプの他端とが接続された第2三方弁と、
を有する濾過装置。
A pump for pumping unfiltered liquid,
A filter that filters by filtering the unfiltered liquid sucked up by the pump from the primary side to the secondary side,
A storage tank for storing the filtered liquid filtered by the filter,
One end of the first water absorption pipe immersed in the unfiltered liquid, one end of the second water absorption pipe connected to the water absorption side of the pump, and one end connected to the primary side of the filter. A first three-way valve connected to the other end of the backwash pipe,
One end of the first water supply pipe connected to the water discharge side of the pump, one end of the second water supply pipe connected to the primary side of the filter, and one end open to the backwash water drainage part. A second three-way valve to which the other end of the backwash water drainage pipe is connected,
A filtration device having:
JP26309398A 1998-09-17 1998-09-17 Filtration device Expired - Lifetime JP3600738B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP26309398A JP3600738B2 (en) 1998-09-17 1998-09-17 Filtration device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP26309398A JP3600738B2 (en) 1998-09-17 1998-09-17 Filtration device

Publications (2)

Publication Number Publication Date
JP2000084316A JP2000084316A (en) 2000-03-28
JP3600738B2 true JP3600738B2 (en) 2004-12-15

Family

ID=17384742

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Application Number Title Priority Date Filing Date
JP26309398A Expired - Lifetime JP3600738B2 (en) 1998-09-17 1998-09-17 Filtration device

Country Status (1)

Country Link
JP (1) JP3600738B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001347268A (en) * 2000-06-06 2001-12-18 Mitsubishi Rayon Co Ltd Water treatment equipment
CN103432814B (en) * 2013-09-11 2017-10-10 天津市润杰创新环保科技有限公司 A kind of filtration system containing recoiling device

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